Dental engine



(No Model.) v

A. A. WILCOX.

DENTAL ENGINE.

' No. 459,429. A Patented sept. 15,1891.

ATTORNEY.

UNITED STATES PATENT OFFICE.

AMOS A. W'ILCOX, OF CLEVELAND, ASSIGNOR TO AARON P. GOULD, JOHN C.

KELTON, AND- ALBERT HOEFFER, ALL OF CANTON, OHIO.

DENTAL ENGINE.

SPECIFICATION forming part of Letters Patent No. 459,429, dated September 1x5, 1891.

Application filed February 2, 1891. Serial No. 379,902. (No model.)

To @ZZ whom t may concern:

Be it known that I, AMOS A. IVILCOX, a citi- Zen of the United States, and a resident of Cleveland, county of Cuyahoga, State of Ohio, have inventeda new and useful Improvement in Dental Engines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings. making part of this specification.

My invention relates to an improvement in dental engines; and it consists of certain features of constructionand combination of parts, as Will be hereinafter described, and pointed out in the claim.

Figure l of the accompanying drawings is a view in perspective of a dental engine illustrating my invention; Fig. 2, a similar vieW of the fiexible connection between the two revolving shaft portions; Fig. 3, a sectional View of the cable connecting the tool-chuck with the outer end of the driving-shaft; Fig. 4, a sectional view of part shown in Fig. 2; Fig. 5, a cover for cable.

Similar letters of reference indicate correspending parts in all of the figures of the drawings.

The vertical support A, Wheel B, and pedal C are of a Well-known and approved form, and

will need no further explanation for the purposes of this application. At the top portion of the support A is swiveled a horizontal support D, in which is journaled a driving-shaft E. At the outer end portion of the support there is provided a head portion F, having branches a, shoulders a2, and projecting portion as, and a central depression a4, and a journal-box a5 from the outer end of shaft E, a similar head portion F having all of the features shown and described in the head portion designated as F, said head forming a support for the inner end portion of the` shaft G. The shafts E and G are connected by a cable portion G', as shown in Figs. 2 and 4, which is of the usual form of cable made for such service. About said cable is placed a coiled-Wire-spring support H, as shown in Figs. 2 and 4, the end portions resting in the depression a4 of the heads F and F', thus forming a flexible portion H intermediate the shafts E and G, by which power and rotary movernentis transmitted from the shaft E to the shaft G. As a further support for'the in'- termediate cable portion H, there is provided intermediate coiled-wire-spring portions H', extending from the shoulders a2 of the head portion F to the head F', by Which means the outer shaft portion G is supported and a strong and durable iiexible portion provided by Which the shafts G may be rotated and swung in any and all directions about the outer end of the shaft E to accommodate the operator in the movement of the handpiece or tool-holder J, Which may be of any of the well-known and approved kinds, and is secured to the outer end of the shaft G by a cable portion K, covered by a hose portion L. The head F, in which the outer end of the shaft is journaled, is sWiveled in the end of the supporting pipe-arm D, as shown at a7, Fig. Li, by which means the head F may rotate about. the shaft to yield to and accommodate the movements of the intermediate yielding connecting portion as the shaft Gand tool-holderis moved by the operator.

In operation the pedal is actuated by the foot of the operator inthe usual Way to rotate the Wheel B, which having a belt connection With a pulley a6, mounted on the inner end of the shaftE, rotary motion scornmunicated from the Wheel B through the shaft D, intermediate flexible cable portion to shaft G, and the tool-holder or chuck.

Having thus fully described the nature and object of my invention, what I claim, and desire to secure by Letters Patent, is-

In a dental engine, the combination of the swiveled horizontal support D, a driving'- shaft E, j ournaled therein, a head F, secured to the outer end of said support and provided With branches a a, having reduced proj ections a3 to form shoulders a2, said head formed with a central recess or chamber a4, through which the said shaft E projects, a cable G', connected to said shaft E, a coil-spring support H, surrounding said cable and having its inner end seated in said chamber or recess a4, and coil-springs having their inner ends placed around said projections a3 and abut- In testimony whereof I have hereunto set ting against the shoulders a2, a head F', to my hand this19th dayot` January, A.D. 1891. which the outer end of the several Springs are attached, a shaft- G, j ournaled in said head y AMOS A. WILCOX. 5 F and secured to the outer end of the cable Witnesses:

G', and a tool-holder secured to said shaft, J. B. FAY,

substantially as set forth. l GEO. A. SNOW. 

